This would be awesome with a GPS so you don't get too lost during the dust storms. Too bad the city changes coordinates so you'd have to make a new one each year or make it wifi/updateable. I like the idea of having a ring around the outside too for when your deep playa.

Yeah! the idea was originally for a GPS map that shows where you are on the Playa. Then when not on Playa, it would just always point to Black Rock City, by having a magnetometer in addition to the GPS. Maybe a pushbutton to reset the coordinates each year, get out there, go to the man, go to the temple, re-calibrate.